Carnegie Steel - Edgar Thompson Works 0-4-0 "Switcher" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class BSI (Locobase 16432)

Data from "American Narrow-Gauge Works Locomotive", Locomotive Magazine, Volume 23 (15 February 1917), pp.21-22. Works numbers were 6063 in January 1918 and 6064 in February. (Given the date of the LM report, the building dates shown above don't seem possible. Yet all sources available to Locobase give January & February 2018.)

Pittsburgh-based Carnegie Steel bought many small industrial locomotives from Pittsburgh-based H K Porter. They ran on several gauges of which the 30" (762 mm) was the narrowest. LM's report on this order claimed that it was "probably the most important that has been constructed for such a narrow gauge ...We cannot call to mind any other engine weighing 43 tons carried on four wheels."

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID16432
RailroadCarnegie Steel - Edgar Thompson Works
Number in Class2
Road Numbers17-18
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 5.75 / 1.75
Engine Wheelbase (ft / m) 5.75 / 1.75
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m) 5.75 / 1.75
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)96,300 / 43,681
Engine Weight (lbs / kg)96,300 / 43,681
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)96,300
Tender Water Capacity (gals / ML)1300 / 4.92
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)80 / 40
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)40 / 1016
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)17" x 20" / 432x508
Tractive Effort (lbs / kg)22,109 / 10028.49
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.36
Heating Ability
Tubes (number - dia) (in / mm)160 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.42 / 3.18
Firebox Area (sq ft / m2)73 / 6.78
Grate Area (sq ft / m2)18.75 / 1.74
Evaporative Heating Surface (sq ft / m2)946 / 87.89
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)946 / 87.89
Evaporative Heating Surface/Cylinder Volume180.19
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3375
Same as above plus superheater percentage3375
Same as above but substitute firebox area for grate area13,140
Power L12997
Power MT137.22

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Wes Barris